PdhD

• Description: dihydrolipoamide dehydrogenase E3 subunit of both pyruvate dehydrogenase and 2-oxoglutarate dehydrogenase complexes
  
  

Gene name	pdhD
Synonyms	citL
Essential	no
Product	dihydrolipoamide dehydrogenase E3 subunit of both pyruvate dehydrogenase and 2-oxoglutarate dehydrogenase complexes
Function	links glycolysis and TCA cycle, enzyme in TCA cycle
Gene expression levels in SubtiExpress: pdhD
Interactions involving this protein in SubtInteract: PdhD
Metabolic function and regulation of this protein in SubtiPathways: pdhD
MW, pI	49 kDa, 4.76
Gene length, protein length	1410 bp, 470 aa
Immediate neighbours	pdhC, slp
Sequences	Protein DNA DNA_with_flanks
Genetic context This image was kindly provided by SubtiList
Expression at a glance   PubMed

Categories containing this gene/protein

carbon core metabolism, most abundant proteins

This gene is a member of the following regulons

stringent response

The gene

Basic information

• Locus tag: BSU14610

Phenotypes of a mutant

• defects in sporulation and unable to grow on glucose as single carbon source PubMed

Database entries

• BsubCyc: BSU14610

• DBTBS entry: [1]

• SubtiList entry: [2]

The protein

Basic information/ Evolution

• Catalyzed reaction/ biological activity: Protein N(6)-(dihydrolipoyl)lysine + NAD⁺ = protein N(6)-(lipoyl)lysine + NADH (according to Swiss-Prot)

• Protein family: class-I pyridine nucleotide-disulfide oxidoreductase family (according to Swiss-Prot)

• Paralogous protein(s): AcoL, LpdV

Extended information on the protein

• Kinetic information: Michaelis-Menten PubMed

• Domains:

• Modification: phosphorylated (Ser/Thr/Tyr) PubMed

• Cofactors:

• Effectors of protein activity:
  • Inhibited thiamine 2-thiothiazolone diphosphate and NADH PubMed
  • Low sensibility to NADPH PubMed

• Interactions:
  • OdhA-OdhB-PdhD PubMed
  • PdhA-PdhB-PdhC-PdhD

• Localization: cytoplasm (according to Swiss-Prot)

Database entries

• BsubCyc: BSU14610

• Structure: 1EBD (complex with binding domain of dihydrolipoamide acetylase, Geobacillus stearothermophilus), 1EBD (complex with binding domain of dihydrolipoamide acetylase, Geobacillus stearothermophilus)

• UniProt: P21880

• KEGG entry: [3]

• E.C. number: 1.8.1.4

Expression and regulation

• • pdhA-pdhB-pdhC-pdhD PubMed
  • pdhC-pdhD PubMed

• Expression browser: pdhD PubMed

• Sigma factor:
  • pdhA: SigA PubMed
  • pdhC: SigA PubMed

• Regulation:
  • pdhA: expression activated by glucose (2.0-fold) PubMed
  • subject to negative stringent control upon amino acid limitation PubMed

• Regulatory mechanism:
  • stringent response: due to presence of guanine at +1 position of the transcript PubMed

• Additional information:
  • belongs to the 100 most abundant proteins PubMed
  • number of protein molecules per cell (minimal medium with glucose and ammonium): 11483 PubMed
  • number of protein molecules per cell (complex medium with amino acids, without glucose): 30290 PubMed
  • number of protein molecules per cell (minimal medium with glucose and ammonium, exponential phase): 11794 PubMed
  • number of protein molecules per cell (minimal medium with glucose and ammonium, early stationary phase after glucose exhaustion): 8779 PubMed
  • number of protein molecules per cell (minimal medium with glucose and ammonium, late stationary phase after glucose exhaustion): 6741 PubMed

Biological materials

• Mutant:

• Expression vector:

• lacZ fusion: pGP723 (in pAC5), available in Stülke lab

• GFP fusion:

• two-hybrid system: B. pertussis adenylate cyclase-based bacterial two hybrid system (BACTH), available in Stülke lab

• Antibody:

• FLAG-tag construct: GP1427 (spc, based on pGP1331), available in the Stülke lab

References

Original publications

Sabine Pérès, Liza Felicori, Franck Molina
Elementary flux modes analysis of functional domain networks allows a better metabolic pathway interpretation.
PLoS One: 2013, 8(10);e76143
[PubMed:24204596] [WorldCat.org] [DOI] (I e)

Frederik M Meyer, Jan Gerwig, Elke Hammer, Christina Herzberg, Fabian M Commichau, Uwe Völker, Jörg Stülke
Physical interactions between tricarboxylic acid cycle enzymes in Bacillus subtilis: evidence for a metabolon.
Metab Eng: 2011, 13(1);18-27
[PubMed:20933603] [WorldCat.org] [DOI] (I p)

Shigeo Tojo, Kanako Kumamoto, Kazutake Hirooka, Yasutaro Fujita
Heavy involvement of stringent transcription control depending on the adenine or guanine species of the transcription initiation site in glucose and pyruvate metabolism in Bacillus subtilis.
J Bacteriol: 2010, 192(6);1573-85
[PubMed:20081037] [WorldCat.org] [DOI] (I p)

Christine Eymann, Dörte Becher, Jörg Bernhardt, Katrin Gronau, Anja Klutzny, Michael Hecker
Dynamics of protein phosphorylation on Ser/Thr/Tyr in Bacillus subtilis.
Proteomics: 2007, 7(19);3509-26
[PubMed:17726680] [WorldCat.org] [DOI] (P p)

Christine Eymann, Annette Dreisbach, Dirk Albrecht, Jörg Bernhardt, Dörte Becher, Sandy Gentner, Le Thi Tam, Knut Büttner, Gerrit Buurman, Christian Scharf, Simone Venz, Uwe Völker, Michael Hecker
A comprehensive proteome map of growing Bacillus subtilis cells.
Proteomics: 2004, 4(10);2849-76
[PubMed:15378759] [WorldCat.org] [DOI] (P p)

Hans-Matti Blencke, Georg Homuth, Holger Ludwig, Ulrike Mäder, Michael Hecker, Jörg Stülke
Transcriptional profiling of gene expression in response to glucose in Bacillus subtilis: regulation of the central metabolic pathways.
Metab Eng: 2003, 5(2);133-49
[PubMed:12850135] [WorldCat.org] [DOI] (P p)

Haichun Gao, Xin Jiang, Kit Pogliano, Arthur I Aronson
The E1beta and E2 subunits of the Bacillus subtilis pyruvate dehydrogenase complex are involved in regulation of sporulation.
J Bacteriol: 2002, 184(10);2780-8
[PubMed:11976308] [WorldCat.org] [DOI] (P p)

P N Lowe, J A Hodgson, R N Perham
Dual role of a single multienzyme complex in the oxidative decarboxylation of pyruvate and branched-chain 2-oxo acids in Bacillus subtilis.
Biochem J: 1983, 215(1);133-40
[PubMed:6414463] [WorldCat.org] [DOI] (P p)